Parting compound.



"UN rrE D STATES PATENT OFFiCE.

n'mvsr c. KBUEGER AND JOHN w. IliANN, or cr'rrcseo, ILLINOIS.

. marine COMPOUND.

No Drawing. v

T all whom it may con'ce'r-n: l

Be it known that we, ERNTT Kln'iccru I IS poured out and allowed toslowly cool.

and JOHN W. Manx, citizens of thc'Unitcd States, and resldents ofChicago,- in the county of Cook and State of Illinois, have inventedcertain .new and useful Improvements in PartingGonn'mumls; -and we. do

hereby declare that the followingis a full.

- clear, and exact description thereof, refer- 10 once being had to theaccompan 'ing drawings, and to the characters of reference jmarked-thereon, which form a part of this I specification.

This invention relates to improvements Hi 'whatare known aspartingcompounds. or i Specification of Letters Patent. 1 Patented1611521, Application filed l ebruary 13,1911. Serial No. coafioolvpl'Ot'PSS, and thereafter-the heatedinixture During the heating ofthe'mixture-it becomes plastic so that it may be readily stirred. and aportion of the olea 'nous constitucnt is drivenotf h'y evapora ion andby burning, the remainder of the oleaginous constituent beingabsorbed inthe pores of the porous substance as well as coating the powders fordusting the patterns used in Q g of fifty pounds of the poroussubstance,-

making sand molds in foundries ,and for dusting sand molds. at theparting hue to facilitate the parting of the sand from the patterns andthe. sand of one part of the v mold from that. of the other part. ofthe? mold.

Among the objectsmf the invention is to provide a parting compound whichis economical to make. which is non=adhesive so.

that it will not stick to the patterns",' even -when-the molding sand isheated; which insures the ready parting of the mold which is infusibleso that it will not melt, which is non-hygzroseopic so that. it will notabsorb moisture and which does not. burn away to leave a residuewhen-the molten metal is poured into the mold.

Our improved parting compound is made Sll'lClOllS substances or marl.

by impregnating and coating; a porous tine grain substance, such as adecomposed sili cious limestone, or amorphous slag or other porous,non-hygroscopic amorphous substance, with an oleaginous'fillerand-coatinfi, such as linseed oil. cottonseed oil or oil hearingsubstances, preferably vegetable oil; and

compound is first mixed with the porous substance and the mixture isheated to a temperature from two hundred and fifty to three hundredand-fifty degrees Fahrenheit,

particles.

The proportions of the porous substance and the oleaginous constituentwill depend somewhat on the capacity of the porous substance to absorbthe oleaginous constitucut. In practice we have'used, fora batch fromone and one-half to two'and one-half 1: pints of the oleaginousconstituent. depending somewhat uponthe character of the constituent. i

I To have used as the porous, silicious sub stance a decomposedsilicious lime stone, and for the 'oleaginous constituent we have foundlinseed oil and cotton seed oil well adapted to produce the resultantmixture desired. Experiments have also been made seed andsul)stauces.=whieh experiments have indicated satisfactory results. Theresultantmixturc with these constituents is a light yellowish powder oflow specific gravity, non-adhesive. amorphous and non-hygroscopic. We may also employ other forms of e have found that the composition; afterthe heat has been extracted therefrom, cools in the form of a powder haing various size particles, and the powder is reduced to a usable meshby a screen or riddling operation. ,Theparticles which are too large tohe used may be crushed to the desired mesh or mixedwith the poroussubstance when another batch of the powder is to he made.

constituent.

We claim as our invent-ion:- 1 A parting compound consisting of a.withcrushcd linseed and other oil bearing fine powder compqsed' of anpleaginqus sub-v the presence of two wit11esses,.t-his 16th day--stancedinborporaged linfapd lmixed with a p0- of February A. 'D. 1911.

'rous, ecompose s i icious imestone. g v T T 2. A partingcompoundcomposed of a }i iRT 5 porous', siliciou s :substan cq impregnatea 1 lunder heat with a vegetable i-l. Witnsses": .s'in testimony, that weclaim the'fdregoing WItLIAM L. HALL, gJg-our invention we afiix oursignatures in WILLIAM GOLDBERGER.

